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https://github.com/SatDump/SatDump
synced 2026-08-13 17:47:30 -04:00
31 lines
980 B
Lua
31 lines
980 B
Lua
-- NDVI
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function init()
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img_lut = image8.new()
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img_lut:load_png(get_resource_path("lut/NDVI.png"))
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return 3
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end
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function process()
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for x = 0, rgb_output:width() - 1, 1 do
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for y = 0, rgb_output:height() - 1, 1 do
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local cch2 = get_calibrated_value(0, x, y, true)
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local cch1 = get_calibrated_value(1, x, y, true)
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local ndvi = (cch2-cch1)/(cch2+cch1)
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local ndvi_lutval = ((ndvi-(-1))*256)/(1-(-1))+0
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local lut_result[0] = img_lut:get(0 * img_lut:height() * img_lut:width() + ndvi_lutval) / 255.0
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local lut_result[1] = img_lut:get(1 * img_lut:height() * img_lut:width() + ndvi_lutval) / 255.0
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local lut_result[2] = img_lut:get(2 * img_lut:height() * img_lut:width() + ndvi_lutval) / 255.0
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for c = 0, 2, 1 do
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set_img_out(c, x, y, lut_result[c])
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end
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end
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set_progress(x, rgb_output:width())
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end
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end
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